Noun dibranchia has 1 sense
  1. Dibranchiata, subclass Dibranchiata, Dibranchia, subclass Dibranchia - comprising all living cephalopods except the family Nautilidae: the orders Octopoda (octopuses) and Decapoda (squids and cuttlefish)
    --1 is a kind of class
    --1 is a member of Cephalopoda, class Cephalopoda
    --1 has members:
     Octopoda, order Octopoda; Decapoda, order Decapoda; Belemnoidea, order Belemnoidea
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